<div>
    It requests signed assertions send by the IdP.
    The <code>WantAssertionsSigned</code> attribute on the <code>&lt;md:SPSSODescriptor&gt;</code> element declares
    that the service provider wants the <code>&lt;saml:Assertion&gt;</code> element to be digitally signed
    This attribute causes a metadata-aware identity provider to auto-configure itself at run time.
    <pre>
        &lt;md:SPSSODescriptor WantAssertionsSigned="true" ...&gt;
    </pre>
</div>
